Alright listen up rookie, welcome to the army, your objective is to match up 3 symbols with the same icons, see those 2 grenades over there? There is another grenade right next to them, use your finger to drag that one over to the group of 2. BOOM there you go, removed the whole row! Good job soldier! OH NO, the enemy is attacking our base! QUICKLY, watch an ad to repel their assault!